Molding apparatus
US4030866A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 24, 1975 |
| Grant date | Jun 21, 1977 |
| Priority date | — |
| Expiry date | Nov 24, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/14
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A molding apparatus for applying a protective coating to an irregularly sized article includes a mold shell having upper and lower portions with mold cavities of a preselected configuration in each portion to receive the article, such as a threaded fitting or coupling, for coating. The shell upper and lower portions are secured together to position the cavities in overlying relation and surrounding the article. Openings extend through the shell portions into the overlying cavities to expose the end portions of the article. Seal members are advanced into the openings and are secured as by threaded engagement to the end portions of the article. The seal members seal the openings and position the article within the cavities to form an annulus surrounding the article as defined by the surface of the cavities. A fluid inlet extends through the shell and into the annulus. A moisture resistant, resilient, polymeric liquid, such as polyvinylchloride, is introduced through the inlet and fills the annulus surrounding the article. After curing the liquid is bonded to the outer surface of the article to form an insulating, moisture resistant, resilient polymeric coating. The coating terminates…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.